Marine animals of the world · a taxonomy puzzle

Oceanclade

Daily puzzle
How to play

A mystery marine animal is hidden in the tree of life. Name any animal from the list and Oceanclade shows the most specific group your guess shares with it. Each guess grows the cladogram, and the rank checklist fills in as you get closer: phylum, class, order, family, genus, and finally species.

For example, if the answer is a manta ray and you guess a great white shark, you learn the mystery animal is in Elasmobranchii, the sharks and rays.

Hints reveal clues about the animal: where it lives, how deep, what it eats, and its size. Pick any hint, in any order; each costs one guess. When you play in a specific region, the “Waters” hint becomes “Range”: where else in the world the animal lives. On Hard, the closeness meter is hidden, so you judge how close you are from the group names. Branch colors show each animal's phylum. Hover over any branch or animal in the cladogram for details, and click or tap a group to see what defines it. After each guess, “What defines…” also shows the traits of the group you share with the mystery animal.

Mode
Difficulty
Hints

Cladogram

Only the groups where branches split are shown

Make a guess to start mapping where the mystery animal sits.

Clues

Guess log

    About

    Credits & sources

    Information sources

    Conservation statuses come from the IUCN Red List of Threatened Species, checked in October 2026 through the citations on Wikipedia and through FishBase. Statuses can change after that date. The family tree is simplified from current scientific classifications. Descriptions and fun facts were written for Marizooa and checked against Wikipedia and FishBase.

    Photos

    Photos come from Wikimedia Commons and are used under the licenses listed below. All were resized, and some are cropped on screen. No endorsement by the photographers is implied.

      Statistics

      Guesses needed to win